@jagan 190208 wrote:
Why not you make single page sites on each domain and take links from contents towards that domain name
That is a more logical and effective approach if you have the time. I would add, that if you do that, vary the anchor text to your main site and don’t always use the same term. Better also not to link every site to your main site’s homepage – do dome “deep links” too. Also, don’t put all 40 links up at once, spread it out over a couple of months or more and if possible, host the domains in several different places. And don’t copy the text from one site to the other – make them all unique.